Year Percent 2001-01-01 76.5000 2002-01-01 66.5000 2003-01-01 63.0000 2004-01-01 66.0000 2005-01-01 75.4000 2006-01-01 75.4000 2007-01-01 50.4000 2008-01-01 46.6000 2009-01-01 55.0000 2010-01-01 57.0474 2011-01-01 51.3492 2012-01-01 44.4953 2013-01-01 44.0365 2014-01-01 41.3825 2015-01-01 42.3559 2016-01-01 41.3588